INDEX. 
Pelobates, 484 
Pelodytes (a genus of frogs), 484 
(a genus of thread worms), 
122 
Pelomyxa palustris, 24 
Pelopzus, 363 
Peltogaster, 276, 277 
Pelycosauria, 512 
Penella, 278 
Penguin, 541 
Pennatula aculeata, 86 
Pentacrinug, 183 
Pentacta frondosa, anatomy of, 
209 3 
Pentastoma, 340 
Pentremites, 189 
Perca fluviatilis, 455 
Perch, 455 
sea, anatomy of, 4384 
Peridinium, 34 
Peripatus, anatomy of, 335 
Perisarc, 61 
Perissodactyla, 600 
Perla, 347 
Perophora, 391 
Petalosticha, 205, 208 
Petromyzon marinus, 410 
niger, 410 
nigricans, 410 
Pezophaps solitarius, 547 
Phalangella flabellans, 144 
Phalangium, 342 
Pharyngobranchii, 408 
Phascolosoma cementarium, 162 
Gouldii, 159 
Pheronema Anne, 48 
Phocena brachycium, 595 
lineata, 595 
Pheenicopterus ruber, 544 
Phoronis, 161 
Phosphorescent annelides, 175 
ascidians, 392 
Hydrozoa, 70 
insects, 355 
715 
Phosphorescent annelides, Pro 
tozoa, 33 
worms, 175 
Phrynosoma Douglassii, 503 
Phylactolemata, 144 
Phyllocarida, 291, 805 
Phyllopoda, 280 
Physa heterostropha, 245 
Physalia arethusa, 68 
Physeter macrocephalus, 594 
Physiology, 12 
Picarie, 550 
Pigeon, anatomy of, 525 
| Pilidium, 156 
Pill bug, 286, 287 
Pipa Americana, 485 
Pipe fish, 461 
Pirarucu, 442 
Pisces, characters of, 411, 463 
development of, 418, 482, 
445 
Pissodes strobi, 352 
Plagiostomi, 419 
Plagusia, 460 
Planarian worms, 99 
land, 108 
lasso-cells of, 101 
nervous system of, 101 
parasitic, 103 
Planaria torva, 101 
Plant lice, 350 
Planula, 59 
Platygaster, 361 
Platyhelminthes, 99, 120 
Platyptera, 347 
Plectognathi, 461 
Pliohippus, 602 
Plesiosaurus, 518 
Plethodon erythronotum, 479 
Pleurobrachia rhododactyla, 93 
Pleurolepis pellucidus, 456 
Pleuroma, 298 
Pleurum of insects, 309 
Plumateila, 140 
. 
